Improved machine for making double-pointed tacks



@met di time.

PURGHES MILES, OFNEW YORK, N. Y.

Letters Patent No. 104,184, dated June 14, 1870.

IMPROVED MACHINE FOR MAKING DOUBLE-POINTED TACKS.

The Schedule referred to in these Letters Patent and making part of the ame To all whom Iit may concern:

properly into line with each other, so that the doublepointed tack will drive in straight instead ot' the points being turned in opposite directions by the act ot' driving,^as` would be the case it' said points were y not turned or bent into line with each other.

In the drawingliignrel is a plan of the dies and mechanism for cutting od the wire and bending the sarn up to shape, and

Figure 2 is a vertical section of the sannel The bed-block a carries the bed-shear b that is ade.

justabie by screws c c, and clamped by the screw c.

rfhe wire d is fed in by constantly-revolving friction-rollels or other suitable means; it passes under a guide, e', wherein 'is a yielding presser c that holds the wire while being cut, the said presser c and the shear f that act with the bed-shear?) are moved by the follower of any suitable press or machine, and I remark that the arrangement of the mechanism is to be such that, as the shear fand presser e are lifted,

the bending-punch g will descend, and the reverse.

The mechanism for giving motion to the various parts may b e of any desired character, and forming no part of this invention need not be further described.

The diagonally-cut end of the wire (l is stopped by the gauge h, as said wire is forced along by the. rollers that feed it in, and the blank d', as it is cut, lies between the end of the bed-shear b, and au adjustable gauge,k.

The adjustable character of the gauges h and 7tand shears b and f, allow the blank d being of a greater or less length as it is cut from the wire. Said gauge h may be ot' any desirable construction. I prefer the slotted block shown, as the end of the tack is not injured thereby.

A holding-jaw, an', allows thc vwire l to slide under it, but prevents thek wire being bent by the rising of the shear f.

The blocks m an, upon which most of the parts before-named rest, receive in grooves the bending-dies o o, the contiguous ends Aof which are shown in the detached view, fig. 3.

The T-heads of these dies are provided with the springs n and regulating screws P.

The springs allow the said dies to slide and yield as the bending punch g carries the blank d' down between the inner ends 'ot' said dies o o, and said springs throw' the dies o 0 up against the sides of the punch g, above the ends of the double-pointed tack, bent up from the blank d' around said punch, so that. the tack is pressed oh" the punch g' as that rises.

The screws 1) adjust the distance to which the dies o o may open.

The sides of the punch g should be inclined slightly inward, as seen in iig. 2, to compensate for any spring in the tack after it is bent.

It the inner ends of the dies o o were square the tack would be bent up in theV form shown in lig. 4, the points diverging; hence, when driven, the points will diverge still more, and the tack could not be withdrawn without injury to the wood, and the tack could not be used a second time.

My invention is made with a special reference to bending the rod or bar, so that these diagonally-cut points shall come into line with each other. lo effeet this, the ends of the dies o 0 are not square, but therounding edges and faces of the dies that come below the straight sides of the blank el' are made filler, or project slightly, as seen at 2 2, in order that the punch y', in descending, shall bend up the wire ata slight oblique angle, so as to throw the points into line with cach other, or as an adjunct to the method of bending herein described, the part-s oi` the die and punch may be set sutliciently close to 'coinpress and extend the uncut edges ot' the limbs.aud thereby throw the points toward the center and into line with each other, as seen in fig.

That I cla-hn as my invention isy 1. The shears l) f, and gauge 71., in combination with the bending-piuich and dies, all arranged and operating substantially as and for the purposes set forth.

2. The dies o 0, formed with oblique faces and sustained by and sliding in the block lnt, in combination with the punch g and shear for separating the blank with an inclined or diagonal out, as specified.

Dated this 18th day of December, A. l) 186i).

1\'\Yitnesses: PURCHES MILES.

Guo. D. Trinken, (Enns. H. Snriu. 

